Firefox maker Mozilla says that means it won't be able to devise a version of its browser to run on Windows RT machines, something it says kills competition and is ultimately bad for customers.

"In practice, this means that only Internet Explorer will be able to perform many of the advanced computing functions vital to modern browsers in terms of speed, stability, and security to which users have grown accustomed," writes Harvey Anderson, Mozilla general counsel in a blog post. "Given that IE can run in Windows on ARM, there is no technical reason to conclude other browsers can't do the same."

He also hints that allowing Internet Explorer but effectively blocking other browsers may stir up already settled legal issues about browser bias. "If Windows on ARM is simply another version of Windows on new hardware," he writes, "it also runs afoul of the EC browser choice and seems to represent the very behavior the DOJ-Microsoft settlement sought to prohibit."

Mozilla project manager Asa Dotzler expands on the perceived problem in a separate blog post in which he acknowledges that initially this will affect mostly tablets. But he says that as ARM processors are more widely used, Windows RT will have a bigger footprint. "ARM will be migrating to laptop PCs and all-in-one PCs very quickly," Dotzler writes. "If you read Microsoft's blog posts about Windows on ARM, you'll see that they expect ARM PCs to cover the whole spectrum. ARM chips are already being used in servers. This is not a tablet-only concern."

No word from Microsoft on this.

Windows 8 upgrades?

Microsoft plans a discount program for customers who buy Windows 7 computers this summer who later want to upgrade to Windows 8 Pro, according to a CNET blog post that attributes the details to unnamed sources.

The intent apparently is to keep up sales of Windows 7 PCs during the run-up to the release of Windows 8, since customers might opt to wait a few months to buy the newer version.

It's not a free upgrade, so customers would buy a Windows 7 PC, then pay more to install Windows 8 on it. Depending on the pricing of the two platforms, that could be more or less expensive than just waiting for Windows 8 and paying for it all at once. Presumably Microsoft has this all thought through.

HP bets its tablet future on Windows 8

HP CEO Meg Whitman says the company will start making tablets again after discontinuing them last year - and they will be based on the new Windows 8 operating system. No word on whether they will be x86 machines or ARM machines.

Whitman also pointed to new technology - memristors - that will eventually be worked into its PCs. A memristor is a resistor that also has memory in enough capacity that it could replace traditional storage in tablets and smartphones. No word on when they might come into play.

Lenovo plans Windows 8 convertible

Lenovo will come out with a Windows 8 version if its tablet/laptop that will take advantage of the operating systems support for traditional applications as well as its new touch-centric Metro aspect, the company's president of products Peter Hortensius told a Wall Street Journal blogger.

The device will be similar to the Lenovo Ideapad Yoga that looks like a laptop, but if you want to use it as a tablet, the keyboard hinges back behind the screen.

Timeframe for the device: 12 months.

No DVD player

Windows 8 won't support playing DVD videos, at least not out of the box. Support for optical players has to come from either a Windows add-on at some unspecified extra fee, be bundled as part of a package by hardware manufacturers or bought from a third party and installed by the end user. There are also some free players out there that users could install.

Microsoft says licensing fees for the decoder is one reason for the decision. Another is that fewer and fewer PC hardware platforms come with optical drives, so it just doesn't make sense to include DVD video support on all of them that run Windows 8, Microsoft says.

ChkDsk gets better

In Windows 8, the ChkDsk utility that looks for and fixes disk problems has been made less disruptive, according to the Building Windows 8 blog.

Currently ChkDsk deals with the disk as a whole and therefore the machine can't be used while it is running. In Windows 8, the checks can be made in the background so users can keep working on the machines. If ChkDsk finds problems, it notes them and fixes them straight away when the machine is taken offline, reducing the downtime needed to fix disk problems.

(Tim Greene covers Microsoft for Network World and writes the Mostly Microsoft blog. Reach him at tgreene@nww.com and follow him on Twitter https://twitter.com/#!/Tim_Greene)

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